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      Studies of spin related processes in fullerene C60 devices

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          Abstract

          We have investigated spin related processes in fullerene C 60 devices using a several experimental techniques, which include magnetic field effect of photocurrent and electroluminescence in C 60-based diodes; spin polarized carrier injection in C 60-based spin-valves; and pure spin current generation in NiFe/C 60/Pt trilayer devices.

          Abstract

          We have investigated spin related processes in fullerene C 60 devices using several experimental techniques, which include magnetic field effect of photocurrent and electroluminescence in C 60-based diodes; spin polarized carrier injection in C 60-based spin-valves; and pure spin current generation in NiFe/C 60/Pt trilayer devices. We found that the ‘curvature-related spin orbit coupling’ in C 60 plays a dominant role in the obtained spin-related phenomena. The measured magneto-photocurrent and magneto-electroluminescence responses in C 60 diodes are dominated by the difference in the g-values of hole and electron polarons in the fullerene molecules. We also obtained giant magneto-resistance of ∼10% at 10 K in C 60 spin-valve devices, where spin polarized holes are injected into the C 60 interlayer. In addition, using the technique of spin-pumping in NiFe/C 60/Pt trilayer devices with various C 60 interlayer thicknesses we determined the spin diffusion length in C 60 films to be 13 ± 2 nm at room temperature.

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          Most cited references 34

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          Intrinsic and Rashba spin-orbit interactions in graphene sheets

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            Spin-orbit coupling in curved graphene, fullerenes, nanotubes, and nanotube caps

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              Inverse spin-Hall effect induced by spin pumping in metallic system

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                Author and article information

                Journal
                JMCCCX
                Journal of Materials Chemistry C
                J. Mater. Chem. C
                Royal Society of Chemistry (RSC)
                2050-7526
                2050-7534
                2018
                2018
                : 6
                : 14
                : 3621-3627
                Affiliations
                [1 ]Department of Physics & Astronomy
                [2 ]University of Utah
                [3 ]Salt Lake City
                [4 ]USA
                Article
                10.1039/C7TC05086K
                © 2018

                http://rsc.li/journals-terms-of-use

                Product
                Self URI (article page): http://xlink.rsc.org/?DOI=C7TC05086K

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